diff --git a/Cargo.toml b/Cargo.toml
index e9398f5f24..3166649ee7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -85,7 +85,7 @@ caps = "0.5.3"
 sysctl = "0.4"
 
 [build-dependencies]
-cfg_aliases = "0.2"
+cfg_aliases = "0.2.1"
 
 [[test]]
 name = "test"
diff --git a/build.rs b/build.rs
index 226a32cccb..6586cee48e 100644
--- a/build.rs
+++ b/build.rs
@@ -27,14 +27,7 @@ fn main() {
         solarish: { any(illumos, solaris) },
     }
 
-    // Below are Nix's custom cfg values that we need to let the compiler know
-    println!("cargo:rustc-check-cfg=cfg(apple_targets)");
-    println!("cargo:rustc-check-cfg=cfg(bsd)");
-    println!("cargo:rustc-check-cfg=cfg(bsd_without_apple)");
-    println!("cargo:rustc-check-cfg=cfg(linux_android)");
-    println!("cargo:rustc-check-cfg=cfg(freebsdlike)");
-    println!("cargo:rustc-check-cfg=cfg(netbsdlike)");
-    println!("cargo:rustc-check-cfg=cfg(solarish)");
+    // Below are custom cfg values set during some CI steps.
     println!("cargo:rustc-check-cfg=cfg(fbsd14)");
     println!("cargo:rustc-check-cfg=cfg(qemu)");
 }